After the attack on Pearl Harbor, rocks and fossils from every U.S. state were collected into a pyramid of national unity.

A Frankenstein blend of science and art allows one tree to produce 40 different types of stone fruit.

Newfoundland's last remaining granite lighthouse.

Roadside collection of 65,000 signs.

This house of worship in the Arctic Circle is shaped like an igloo.

Natural earth mounds formed in the far north.

Mind-blowing carvings and fantasy ice scenes grace the largest year-round ice environment in the world.

The beginning of the historic Iditarod Trail connecting the Alaskan cities of Seward and Nome.

This WWII-era military installation once held an entire city within its walls - now, its walls are falling down.

This small city where almost everyone lives in the same building can only be reached via North America's longest tunnel.

Running under an entire mountain, the longest highway tunnel in North America is kept fresh using portal fans and jet fans.

A high school astronomy enthusiast designed this model of our solar system to be traversed on foot.

This whimsical stacked cabin looks like something out of a children's book.

This Alaskan town appoints the general store's resident feline as honorary mayor.

Fossils, railroads, and waterfalls!

In 1909, the steepest and most difficult piece of track on the Canadian Pacific Railway was replaced with a series of spiralling tunnels cut into the mountains.

This natural wonder is disappearing at an alarming rate.

With a floor made of thick glass, this observation deck offers a full view of Sunwapta Valley's mountains and rivers.

A giant owl named Rocco oversees mythical woodland creatures along these charming mountain trails.

This massive metal sculpture in the shape of a folded paper airplane overlooks a Utah mountain.